Design for Sound Operated Light Circuit

[Maddy]

I am learning morse code. There are software available which convert
any text into morse and give the output to the headphone jack. I was
wondering if this sound output at the headphone/speaker jack can be
used to power a LED or incandescent bulb? Would be thankful if anyone
can suggest a solution.
Thanks
Nitin

 

[JeffM]

I am learning morse code.
There are software available which convert any text into morse
and give the output to the headphone jack.
http://www.google.com/search?q=cach...listen-*-*-*+full-control-*-*.*-*-*-*&strip=1

I was wondering if this sound output at the headphone/speaker jack
can be used to power a LED or incandescent bulb?

You could use a seperate/additional amplifier.

 

[Frank Buss]

I am learning morse code. There are software available which convert
any text into morse and give the output to the headphone jack. I was
wondering if this sound output at the headphone/speaker jack can be
used to power a LED or incandescent bulb? Would be thankful if anyone
can suggest a solution.

You can use your hi-fi system: Use one speaker output for a speaker, if you
want to hear it and connect a 220 ohm resistor and a LED in series to the
other output. Adjust balance and loudness that you can hear something in
the desired loudness and see the LED light, if there is a signal.

A incandescent bulb is not a good idea, because turning it on and off
often, will wear away it fast.

 

[Jan Panteltje]

I am learning morse code. There are software available which convert
any text into morse and give the output to the headphone jack. I was
wondering if this sound output at the headphone/speaker jack can be
used to power a LED or incandescent bulb? Would be thankful if anyone
can suggest a solution.
Thanks
Nitin

+ 9V + 9V
| a |
LED R3
| k ----|
C1 + c | c
audio line level ----|||-----------b NPN |--b NPN
| | e Q1 | e Q2
/// R1 | | |
| R2 | ///
| | |
| /// |
|_____________________|

R1 22k
R2 82 Ohm
R3 2k2
C1 10uF / 3V
Q1, Q2 transistors: almost any NPN si, for example BC548, BC109, etc.

This can be run from a 9 V battery.
It is in fact a very sensitive AC detector.

Optinally one can connect a capacitor from the collector of Q1 to ground.

 

[GregS]

I am learning morse code. There are software available which convert
any text into morse and give the output to the headphone jack. I was
wondering if this sound output at the headphone/speaker jack can be
used to power a LED or incandescent bulb? Would be thankful if anyone
can suggest a solution.
Thanks
Nitin

I learned the Morse long ago, but I really don't think I could easily convert
light to letter very easily. One problem for me would be looking at the light and
looking at my sheet. I know it would be a huge problem watching several sources
mixed together.

greg

 

[legg]

I am learning morse code. There are software available which convert
any text into morse and give the output to the headphone jack. I was
wondering if this sound output at the headphone/speaker jack can be
used to power a LED or incandescent bulb? Would be thankful if anyone
can suggest a solution.
Thanks
Nitin

I think you will find that Morse is more easily/quickly comprehended
audibly (or in mechanically/electrically written text) than visibly.
In situations where only visible communication is possible, reliable
Morse transmission speed may be reduced to as much as 1/3 that of
other methods. It's also visually exhausting for longer messages -
wearing out the eye's point-perception capacity, quite rapidly.

RL

 

[JeffM]

I am learning morse code[...]

wondering if[...]the headphone/speaker jack

can be used to power a LED or incandescent bulb?

+ 9V + 9V
| a |
LED R3
| k ----|
C1 + c | c
audio line level ----|||-----------b NPN |--b NPN
| | e Q1 | e Q2
/// R1 | | |
| R2 | ///
| | |
| /// |
|_____________________|

While I applaud your effort, my intuition is
1) The OP doesn't know which end of a soldering iron to hold.
1a) He should be posting ONLY to sci.electronics.basics.

2) As he is MULTI-POSTING
from Google, he is quite clueless
and will see *this* blob (in a proportional font)
http://groups.google.com/group/sci.electronics.design/msg/e37e03faaf5e6b59
and not know what to do with it.

3) Even if he knew how to get to a monospaced version, like
http://groups.google.com/group/sci.electronics.design/msg/e37e03faaf5e6b59?dmode=source
your ASCII technique will likely leave him baffled
(even if you didn't leave out the characters where junctions are
supposed to be).

Frank's answer (and mine) leaning toward COTS stuff
seems more apt.
Even Bill Bowden's response in the s.e.b thread
(to use a step-up transformer) seems over the OP's head.

That's what the evidence says to me. Of course, I could be wrong.

 

[neon]

I am learning morse code. There are software available which convert
any text into morse and give the output to the headphone jack. I was
wondering if this sound output at the headphone/speaker jack can be
used to power a LED or incandescent bulb? Would be thankful if anyone
can suggest a solution.
Thanks
Nitin[/
Even if you could stick a LED or LAMP what you will see is a lit lamp uuuu nnnleeessss you send code thhhiiiissss slow

 

[Rich Grise]

That's what the evidence says to me. Of course, I could be wrong.

FWIW, you're one of about two total google posters I've ever seen come
back to read responses. I think they expect the answers to show up under
their pillow or something. ;-)

Thanks,
Rich

 

[Jan Panteltje]

I am learning morse code[...]

wondering if[...]the headphone/speaker jack

can be used to power a LED or incandescent bulb?

+ 9V + 9V
| a |
LED R3
| k ----|
C1 + c | c
audio line level ----|||-----------b NPN |--b NPN
| | e Q1 | e Q2
/// R1 | | |
| R2 | ///
| | |
| /// |
|_____________________|

While I applaud your effort, my intuition is
1) The OP doesn't know which end of a soldering iron to hold.
1a) He should be posting ONLY to sci.electronics.basics.

That's what the evidence says to me. Of course, I could be wrong.

Sure, just for fun, here is the ltspice version
ftp://panteltje.com/pub/ac_detector_1.gif

You will see about 11mA LED current for 1V input @ 1000Hz.
The LED brightness can be set by the volume control.
As the pulses are 1000Hz, that seems like constant 'on' during key presses.

Fun for me to play , if it educates anyone, great.
He posted to the right group with s.e.d.

 

[JeffM]

[...]That's what the evidence says to me. Of course, I could be wrong.

FWIW, you're one of about two total google posters I've ever seen
come back to read responses. I think they expect the answers
to show up under their pillow or something. ;-)

Nah. I won't argue with the general sentiment,
but your arithmetic is off.
Last time he gave a count, JT had 65 of us whitelisted.

 

[Archimedes' Lever]

You could use a seperate/additional amplifier.

G-Force Platinum from soundspectrum.com

Best audio stimulated light show to date.

Accepts external sources too!

 

[Maddy]

Thanks a lot for the great response. Especially Jan for the circuit.
As deduced from the evidence, I am a newbie. Dont have much practice
but do surely know which end of the soldering iron to hold. Need the
info to help somebody else implement it. However, didnt quite
understand all the text symbols on the circuit. However, thanks for
it, I will work it out.
Thanks again,
Nitin

 

[LVMarc]

I am learning morse code. There are software available which convert
any text into morse and give the output to the headphone jack. I was
wondering if this sound output at the headphone/speaker jack can be
used to power a LED or incandescent bulb? Would be thankful if anyone
can suggest a solution.
Thanks
Nitin

This can be one and made into a cool product for hearing impaired
telegraph instruction!

Marc